Yes, that's what I thought, too. Thats why I recommendet an isolation transformer.
There is a reason why studios in the 80ies and 90ies had everything powered over those little helpers.
@OP: In your case it could be the mains acting as an antenna.

 

Last edited: Aug 13, 2025 at 8:27 PM

Main wall plug source can be tested by borrowing some UPS (Uninterruptible Power Supply) to deliver current without being plugged in the wall.

No noise with unplugged from wall UPS : Main is the culprit

 

Did you read the one link previously that I provided? Here's two that you'll also probably skip. The first explores industry capture of the transmission industry (a fox guarding the he house thing) and the second another study on dangers of which there are enough to raise your eyebrows and to perhaps reevaluate your belief system.

https://pmc.ncbi.nlm.nih.gov/articles/PMC7405337/
https://www.sciencedirect.com/science/article/abs/pii/S0161813X06001835

Basic fucking physics says that non-ionizing radiation such as UV light is harmful, on a sunny or even a cloudy day it can burn skin...obviously. Are you arguing against yourself?

Don't make your own bias a personal attack.

 

Ah yes, your evidence.
- Your first link is a study with a laughably low number of participants (12 tested, 12 as control).
- Your second link isn't even a study, but only an opinionated article. It's the absolute lowest tier of evidence that can be published as a scientific article. On top of that, very suspicious language is used in this one, such as "cartel" and "hijack". There is no need for this kind of emotional vocabulary in scientific literature.
- And your third link is a study that only observes the complaints from the participants. Also, the exposed and control groups were living at different places, so there are a thousand of other factors that could impact the results.

At the very top of the levels of evidence pyramid in medical research, is systematic reviews :

So what do the systematic reviews say about this subject ?

https://www.sciencedirect.com/science/article/pii/S0160412024001983
"available evidence suggests that acute RF-EMF below regulatory limits does not cause symptoms and corresponding claims in the everyday life are related to perceived and not to real EMF exposure status."

https://journals.plos.org/plosone/article?id=10.1371/
"In summary, we could not identify a high evidence for any significant detrimental health effects of RF EMF of mobile communications on children and adolescents. Nevertheless, we do not conclude that such exposure would be safe for this particular age group, since the evidence base for this conclusion is too weak."

https://www.sciencedirect.com/science/article/pii/S0160412024004859
"Overall, the results from all domains and subclasses across their speed- and accuracy-related outcome measures according to GRADE provide high to low certainty of evidence that short-term RF-EMF exposure does not reduce cognitive performance in human experimental studies."

https://pubmed.ncbi.nlm.nih.gov/37729852/
"The body of evidence had limitations that did not allow an assessment of whether RF-EMF may affect pregnancy outcomes at exposure levels below those eliciting a well-known adverse heating impact. In conclusion, in utero RF-EMF exposure does not have a detrimental effect on fecundity and likely affects offspring health at birth, based on the meta-analysis of studies in experimental mammals on litter size and fetal weight, respectively."

So in conclusion, the current scientific literature is very clear and consistent. Further study should be made, but as of now, there is no current evidence of adverse effects from exposition to RF-EMF under regulated levels.

Ionizing radiations is well-known category of radiations as it directly impacts atoms, so pretty much everything. UV light makes the transition. UVA and UVB are non-ionizing, but UVC is. However, UVA and UVB is still harmful to our skin because while it does not ionizes atoms, its frequency is still high enough to break DNA strands. Think about audio, the smaller the microphone capsule, the higher the frequencies it will capture. The higher pitched the glass is, the higher you need to sing to break it. It's the same thing here, the smaller the component you want to break, the higher the frequency of the radiation needs to be.

Of course, you can still break a small microphone capsule with a 20Hz sound wave. But you would need so, so much energy. And it's the same thing with radio frequency radiation. Of course that you can break DNA with it. But you'd need such high energy that it will break it through heating. Hence why it is not safe to stand inside a microwave oven.

Again, you will receive electromagnetic radiation in higher levels and frequencies from the tungsten light bulb in your room, than the cell tower right next to your home. So if we should worry about radio frequency radiation, we should worry about infrared light too. Also we should worry about... ourselves too ? Because the human body emits infrared light as well, and not only to the outside but to the inside as well. Our organs are constantly exposed to our own electromagnetic radiation.

 

Last edited: Aug 14, 2025 at 12:28 PM

Do your monitors make the same noise while only connected to mains and nothing else (so no signal cables) and on of course. If no it is not your monitors!!!!

 

That's not the way to test that IMHO.
I don't know enough of that stuff unfortunately, but I've seen systems becoming an antenna with connecting the audio cables. And it wasn't the classic hum loop, I definitely captured some interference with some loop antenna my system must have been.
I think only way to test mains is an isolation transformer. Not even sure a ups would do the job properly because it's main reason of existence is something else. It might do the job though. But if an isolation transformer doesn't change anything, mains is not to blame. For tests like that ordering stuff on amazon is great and sending it back.
Just saying today I have three peak tech 2240 in my studio and I'm happy those exist.
Two are installed in my setup and one is for testing.

 

You said I don't know enough of that stuff unfortunately.
But I do and I know troubleshooting. So first steps first. Do they have interference without signal cables?

Also, is it also happening when your mobile phone is NOT around. Interference coming from your phone is also a nasty one.